Tweet with cast members of ABC’s “General Hospital” today, April 1, using hashtag #GH50 during the East Coast broadcast of the daytime soap (2:00 – 3:00 PM ET/11:00 AM – 12:00 PM PT). Fans will be able to chat with such “GH” stars asRebecca Herbst (Elizabeth Webber), Jacklyn Zeman (Bobbie Spencer), and even Kimberly McCullough (Robin Scorpio), whose characters is supposed to be “dead!” Hmm…